Barrel-hoop machine



A. N. EATON.

BARREL HOOP MACHINE.

APPLICATION FILED AUG-.17, 1920.

1 390,282. Patentedfiept. 13, 1921.

1,2 I v Fig. 1@

A. N. EATON. (BARREL HOOP MACHINE.

APPLICATION FILED Aue.1z, 1920.

l 390 282. Patentedfiept 13,1921. 2 SHEETS-SHEET 2.

okix

UNIT

P A T E OFFICE. i

BARREL-HOOP MACHINE.

To all whom tmag concern: i

.Be it known that I, ALBERT N. EATON, a citizen of the United States, residing at Omaha, in the county of Douglas and State of Nebraska, have invented certain new and useful Improvements in Barrel-Hoop Ma chines, of which the following is a specification.

The present invention relates to improvements in barrel hoop forming machines, and has for an object to provide an improved machine of this character which will be capable of forming a barrel hoop in a single operation without the use of rolling mills or presses in the manner at the present time done. Another object of the invention resides in providing an improved barrel hoop forming machinewhich will be rapid in operation, serving to produce great numbers of the hoops in a minimum spaceof time and at a saving in labor and operating costs.

A. further object of the invention is to provide a compact and simple machine for carrying out theabove described purposes which may be installed in conjunction with the usual punch press. p I l With these and other objects in view the invention consists in the novel details of construction andcombinations of parts more fully hereinafter disclosed.andparticularly pointed out in the claims.

In, the accompanying drawings forming a part of this application, and in which similar reference symbols indicate corresponding parts in. the several views:

Figure 1 .is a side elevation of an improved device' constructed in accordance with the present invention, and illustrated as restingon the bed of-a punch press, which is shown partially in section and with the punch elevated above the same and partly broken away, I I

Fig. 2 is a plan view of the same with the punch removed. i p h Fig. 3 is a longitudinal sectional View taken on the line 3-3 in Fig. 2.,

Fig. 4 is a plan view of the die guide plate.

Fig. is asimilarview of ithe die top plate.

; Fig. .6 is a sectional ,view takenthrough a hoop formed by the improved machinei M Fig. 17 is a similar view of a metal ring prior to its insertion in the machine,

finished hoop.

hold the plate in place.

Specification of Letters Patent. Patented S t-13, 1921, Application filed August 17, 1920. Serial No. 4%,093.

Fig. "8 is a plan view, on an enlarged scale, ofone ofthe die segments; and

F g. 9 1s.a side view of one of the connectlng links.

Referring more particularly to the drawings, 1O designates the bed of a punch press, 11 the punch, and 12 the punch point.

These parts are oldand well known and constitute no portion of the present invention.

The invention in theprovision of a device mounted upon the bed '10 and adapted to receive a ring 13, such as shown in'Fig.-7, and provided with die segments of an expansible character that are moved by suitable devices mounted in. conjunction with the punch .point- 12, whereby a bead 1401: the character'shown in Fig. 6 may be provided on the This bead ltis pressed outwardly'from the central part of thehoop 13,1-and it imparts stiffness to the hoop, is ornamental, and has other well known desirable features.

It is theobject ofthis invention to provide.

a devicefor forming this bead 14., This device consistsof a plate 15 having acentral opening to receive a stud or post .16 which projects upwardly beyond the plate 15 and preferably seats within a socket .17 made in the bed screws, or other fastenings 18 may be employed to pass through the plate about the post 16 and to enter the bed 10 in order toeffectually of the plate 15 is more particularly illustrated in Fig. 4, and possesses radially disposed slots 19 forming guide ways to receive centrally formed ribs 20 projecting beneath the segments 21, of which there are anyfsuitable number. l g u l The die segments are arrangededge to edge and form a complete circle surroundmg, the post 16. Theouter arouate edges of the die segments are, formed with punch; beads 22adapted to enter. punch sockets 23 in an outer ring 24 which rests upon the bed 10 and embraces the segments. A slot 25is left betweenthe ring 24.- andthe beads 22 when they are in a retracted position, to permit ,offthe insertion of the staveringlB in the mannershown in Fig. 3. The ring is supported on its edge by the bed; l0 qand the arrangementof partsis such that when driven outwardly the beads of the segments more particularly consists The upper face in Fig. 5, rests upon the segments 21 and is of considerable weight in order to impose a pressure thereon to hold them in their correct relative positions. The plate 30 is slotted radially, as indicated at 31, along suitable lines to agree with the positions of the various links 27, in order that these links may have freedom of operation.

The various links, as shown in Fig. 9, are provided with perforations 32 and 33 at their opposite ends that they may receive the coupling pins by which they are respectively secured to the segments 21 and the anvil member 29. The anvil member 29 is providedwith a depending bearing 84 slidngly fitted over the upperend of the post 16, a coil spring 35 being employed to hold the anvil member 29 in the elevated position shown in Figs. 1 and 3. This coil springis arranged between thecentral portion of the baseplate' 15 and the under side of the anvil member. A

As shown more particularly in Fig. 2, the ring 24: is composed of a pair of sections hinged together for instance at 36, and provided at their opposite sides with lugs 37 adapted to receive a U-shaped clip 38 constituting substantially a clamp and having a set device 39 by which the lugs 37 may be forced tightly together.

As these barrel hoops are formed at the present time they are subjected to what is (nown as the rolling process, which is expensive and slow. This process consists in cutting a strip of metal to a suitable length, forming it into a ring, and welding its ends together. This is an'initial step by which the ring 13 in Fig. 7 is produced. This method is still carriedon in accordance the present invention. However,

the old process consisted inplacing the ring '13, formed asfj-ust mentioned, between rollers which would b" a gradual recess form the crimp or beac therein. I radual pressure according to the old process Wasput upon the .ring, so thatithe beador crimp was armed; slowly this process being carried out until after subjection to a required pressure, thedesired amount of crimp was forifned.

B use enlistees-eat invention the band a s'forme'd in ring 13,, is placed in the position shown in Fig. 3 and the punch point position to theaction of the coil spring 35,

which will be correspondingly compressed, and. through the action of the links 27 die segments 21 will be forced outwardly, they bein guided by the ribs 20 and cs lots li). The bead 22 will therefore press the metal of the ring 13 into the sockets 23 in the outer member 2e, and the crimp in the barrel hoop will be formed quickly and in one operation.

After the punch point retires upwardly the coil spring 35 will restore the parts to the position shown in Fi 3, withdrawing the die segments and permittingof the withdrawal of the hoop just formed, which may be done by separating the two half'sections of the ring 24. p

It is obvious that those skilled in the art may vary the details of construction and arrangements of parts without departing from the spirit of my invention, and therefore I do not wish to be limited to such features except as may be required by the claims.

I claim:

1. A barrel hoop forming device comprising a pair ofrelatively movable die members having means to form a crimp in a hoop, an anvil connected to one of said die members and adapted to drive the same into operative relation with the other die member to form the bead in said hoop, yieldable means acting on said anvil member to hold the same and the connected-die member in a normally inoperative position, a base plate beneath the movable die members having means to guidetheir movements, andmeans projecting up from the plate and slidably engaged with thelanvil to direct its motion. 7 2. In combination with a punching machine having a bed and a punch point, of an anvil located beneath the punch point and adapted to be operated thereby, reciprocating punch segments, links connecting said segments and anvil, spring means for yieldingly holding the anvil elevated, means to guide the anvil in its reciprocating movemerit, a base plate adapted to rest on the bed 'of the punching machine and having guideways to direct the movements of the segments, a weight plate placed upon the upper portions of said segments, and a die ring surrounding said segments and spaced therefrom, substantially as described,' 7 j 3. A machine as described comprising an outer die ring, a base plate lying within the ring, radially reciprocating die blocks on the plate to coe'perate with the ring, complementary means between the plate and blocks to guide the movements of 'the l'atte'r, .an anvil initially held *in an upper position,

7 connections between the anvil and die blocks,

comprising a base plate adapted to be aflixed to a support and having a number of radial grooves made in its upper face, a series of die segments having ribs on their lower sides slidably fitted in said grooves, an anvil lying above the central portion of the base plate, means extending up from the plate for guiding the movement of said anvil, spring means extending beneath the base 10 plate and anvil for holding the latter in an upper initial position, an outer die ring in spaced relation about said plate and seg In testimony whereof, I have aiiixed my 15 signature in presence of two Witnesses.

ALBERT N. EATON. Witnesses:

E. C. STURGES, ARTHUR H. STURGES. 

